sierra 6mmbr data

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V • RIFLE RELOADING DATA

Test Specifications/ComponentsFirearm Used: Savage 12VSSBarrel Length: 26"Twist: 1 x 8" Case: RemingtonTrim-to Length: 1.550"Primer: Remington 7 1/2

Remarks:In the late 1970s, Remington market-

ed a line of cases under a rather uniquepremise — the brass was not intendedto be loaded as it came from the factory.Known as the Remington Bench Restcase, this was a thin-walled 308Winchester case dimensioned to acceptthe small rifle primer and specifically

annealed for case forming. Behind the scenes, Remington’s Mike Walker and JimStekl had been working with a series of short, squat little cartridges based on the308 head size. Based on their results from testing and actual benchrest competi-tion, the BR family (as they came to be called) showed tremendous promise.Since then, both the 22 and 6mm BR chamberings have been offered inRemington’s vaunted 40-X target rifles.

The 6mm BR’s closest competitor is the 6mm PPC. Similar in case shapeand capacity, the performance levels of the two are quite similar. Why has thePPC come to dominate the benchrest game so completely while the 6mm BRhas been slow to catch on? It’s hard to say. Much of the early brass imported forthe PPC was extremely high quality, giving outstanding results when the car-tridge was introduced. At the same time, the BR required considerable work toform it from the parent 308 Bench Rest case. At any rate, the PPC became thepreferred choice for benchrest competition, leaving the 6mm BR something of aforgotten cartridge. This is beginning to change, and interest in this fine littleround is increasing.

Remington finally standardized the 6mm BR in 1989, offering both loadedammunition and factory-formed brass. It should be noted that the case standardized in 1989 was changed slightly from the original dimensions of thewildcat 6mm BR. The new case has a neck .040" longer than the original,making the maximum case length 1.560". Guns produced prior to January1989 require the cases to be trimmed by .040” before they can be used. Sincemany of these guns were produced for benchrest competition, rifles havingtight necks may be encountered. A chamber cast, which can be done by anycompetent gunsmith, is the best way to determine the neck dimensions ofyour rifle.

6mm BR Remington

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INDICATES MAXIMUM LOAD – USE CAUTIONLOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.

RELOADING MANUAL • 5TH EDITION

Bullet Name6mm BR Remington continued

#1500 .243" 60 gr. HP C.O.A.L. 2.075"

#1502 .243" 55 gr. BlitzKingC.O.A.L. 2.100"

Powder /Velocity 2900 3000 3100 3200 3300 3400AA-2015 26.2 27.2 28.3 29.3 30.3RE-7 22.3 23.5 24.7 25.8 27.0 28.2IMR-3031 27.7 28.5 29.3 30.0 30.8Benchmark 27.3 28.2 29.1 30.0 30.9 31.8H322 26.5 27.3 28.1 28.9 29.7X-Terminator 26.9 27.9 28.9 29.8 30.8 31.8AA-2230 27.4 28.4 29.4 30.4 31.4 32.4IMR-4895 30.1 30.9 31.8 32.6Viht N135 27.2 28.2 29.2 30.2Varget 30.3 31.2 32.1 33.0 33.9Energy/ft.lbs. 1120 1199 1280 1364 1451 1540

Powder Grains Velocity Ft. lbs.

Accuracy Load H322 28.9 3200 1364Hunting Load RE-7 28.2 3400 1540

Developing surprisingly high velocities for such a small case, the 6mm BRhas outstanding potential as a varmint cartridge. With the heavier bullets, andvery precise shot placement, the 6mm BR is a marginally adequate deer car-tridge. At present, the BR cartridges all appear to have a promising futureahead of them.

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#1505 .243" 70 gr. HPBT MatchKingC.O.A.L. 2.150"

#1507 .243" 70 gr. BlitzKingC.O.A.L. 2.150"

#1510 .243" 75 gr. HP C.O.A.L. 2.125"

Powder /Velocity 2900 3000 3100 3200AA-2015 27.5 28.6 29.6RE-7 24.2 25.4 26.7 27.9IMR-3031 28.5 29.3 30.1Benchmark 28.2 29.2 30.2 31.2H322 26.8 27.9 28.9 30.0X-Terminator 27.7 28.8AA-2230 28.6 29.8IMR-4895 30.1 31.0Viht N135 27.8 29.3Varget 30.7 31.4 32.1Energy/ft.lbs. 1400 1499 1601 1706


Accuracy Load Viht N135 29.3 3000 1499Hunting Load Benchmark 31.2 3200 1706

Sierra does not recommend MatchKing bullets for hunting applications.

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RELOADING MANUAL • 5TH EDITION


#1515 .243" 80 gr. SBT Blitz C.O.A.L. 2.150"

#7150 .243" 80 gr. SPT (SSP)C.O.A.L. 2.150"

#1520 .243" 85 gr. SPT C.O.A.L. 2.170"

#1530 .243" 85 gr. HBPTC.O.A.L. 2.150"

Powder /Velocity 2700 2800 2900 2950AA-2015 26.1 27.3 28.5RE-7 23.8 25.0 26.2IMR-3031 26.8 27.8 28.8 29.3Benchmark 26.8 27.8 28.8 29.3H322 25.7 26.7 27.7X-Terminator 26.1 27.0IMR-4895 28.0 29.1 30.2Viht N135 25.9 27.6Varget 28.7 29.6 30.5Energy/ft.lbs. 1295 1393 1494 1546


Accuracy Load X-Terminator 27.0 2800 1393Hunting Load Benchmark 29.3 2950 1546

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#1540 .243" 100 gr. SPT C.O.A.L. 2.170"

#1560 .243" 100 gr. SBTC.O.A.L. 2.170"

Powder /Velocity 2200 2300 2400 2500 2600AA-2015 21.6 22.6 23.6 24.6RE-7 19.3 20.4 21.4H322 20.8 21.7 22.6IMR-4895 22.3 23.8 25.2Viht N135 20.9 22.5 24.0Varget 21.1 22.7 24.3 25.9 27.5AA-2520 21.8 23.2 24.5 25.9 27.2Viht N140 21.8 23.3 24.8 26.2 27.7Viht N540 22.6 23.9 25.2 26.5 27.8RE-15 20.6 22.4 24.1 25.9 27.6Energy/ft.lbs. 1074 1174 1279 1388 1501


Accuracy Load AA-2015 23.6 2400 1279Hunting Load Viht N540 27.8 2600 1501

#1570 .243" 107 gr. HPBT MatchKingC.O.A.L. 2.375"

Powder /Velocity 2400 2500 2600 2700AA-2015 23.5 24.8 26.1H322 23.1 24.3 25.5IMR-4895 24.9 26.2 27.4 28.7Viht N135 23.9 25.5 27.0Varget 25.5 26.8 28.1 29.4AA-2520 26.0 27.3 28.6Viht N140 25.0 26.3 27.5Viht N540 25.5 26.5 27.5 28.5RE-15 24.7 25.9 27.1 28.3Energy/ft.lbs. 1368 1485 1606 1732

Powder Grains Velocity Ft. lbs.Accuracy Load Varget 28.1 2600 1606

Sierra does not recommend MatchKing bullets for hunting applications.

(7"-8" twist barrel required)

sierra 6mmbr data

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